Technology is the application of scientific knowledge for achieving practical goals in a reproducible way. The word technology can also mean the products resulting from such efforts, including both tangible tools such as utensils or machines, and intangible ones such as software. Technology plays a critical role in science, engineering, and everyday life. Technology has had a profound impact on the world. It has changed the way we live, work, and communicate. It has also led to new challenges, such as environmental pollution and social inequality.